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Effect of co-doping on structural, microstructural, dielectric, impedance and magnetic properties of sol-gel synthesized Bi(1-x)TrxFe(1-y)MnyO3 (Tr = Cr, Ni, Zn, Cu) multiferroic nanoceramics

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Abstract

Nano-crystalline powders of Bi(1-x)TrxFe(1-y)MnyO3 (where x & y = 0, 0.05 and Tr = Cr, Ni, Zn, Cu) were prepared using sol-gel autocombustion method. Structural studies on the calcined nanopowders using X-ray diffraction and Fourier transform infrared spectroscopy confirm the perovskite phase with rhombohedrally distorted structures. Microstructural studies using scanning electron microscopy and energy dispersive spectroscopy on the sintered surfaces display uniformly knitted fine grained microstructures with thin grain boundaries and the presence of all element’s constituent for the synthesis of the samples, respectively. Dielectric properties were evaluated at various frequencies and temperatures and found to follow space charge polarization with significantly reduced dielectric losses at all frequency ranges investigated. Impedance study on the samples aids in understanding the contributions of electrical conductivity and interfacial polarization, and the results verify the claims explained during the dielectric property investigation. Magnetic studies on the samples reveal that among all the samples, Cr/Mn co-doped (BCrFMO) sample shows significant enhancement in the value of saturation magnetization (3.718 emu/g) while Ni/Mn co-doped (BNiFMO) sample demonstrates higher coercivity (259.734 Oe) at room temperature. With all enhanced structural, microstructural, dielectric and magnetic order through the influence of co-doing, these materials are highly recommended for spintronic, multifunctional memories, sensors, and actuators.

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Highlights

  • Wet chemical synthesis of sol-gel autocombustion produced Bi(1-x)TrxFe(1-y)MnyO3 (where x & y = 0, 0.05 and Tr = Cr, Ni, Zn, Cu) multiferroic samples with co-doping effect were studied for the first time.

  • XRD and FTIR data shows that all samples have rhombohedral-symmetric single-phase perovskite structures.

  • Co-doping boosts magnetic order in all Cr, Ni, Zn, Cu and Mn co-doped samples.

  • Highest magnetization value of 3.718 emu/g was evident in Cr-Mn co-doped bismuth ferrite (BCrFMO) sample.

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Authors and Affiliations

  1. Department of Physics, Vignan’s Institute of Information Technology (VIIT-A), Visakhapatnam, AP, 530049, India

    B. Dhanalakshmi

  2. Department of Physics, Raghu Institute of Technology, Visakhapatnam, Andhra Pradesh, India

    A. S. Madhusudanacharyulu

  3. Department of Physics, Andhra University of college of Engineering for Women, Visakhapatnam, Andhra Pradesh, 530017, India

    J. Madhuri Sailaja

  4. Department of Physics, Swarnandhra College of Engineering Technology, Narsapur, Andhra Pradesh, 534280, India

    N. Gnana Praveena

  5. Department of Physics, International School of Technology and Sciences for Women, Rajamahendravaram, Andhra Pradesh, 533294, India

    B. Vikram Babu

  6. Department of Physics, Anil Neerukonda Institute of Technology & Sciences, Sangivalasa, Visakhapatnam, Andhra Pradesh, 531162, India

    Ch. Komali

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  1. B. Dhanalakshmi
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  2. A. S. Madhusudanacharyulu
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  5. B. Vikram Babu
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Dhanalakshmi, B., Madhusudanacharyulu, A.S., Madhuri Sailaja, J. et al. Effect of co-doping on structural, microstructural, dielectric, impedance and magnetic properties of sol-gel synthesized Bi(1-x)TrxFe(1-y)MnyO3 (Tr = Cr, Ni, Zn, Cu) multiferroic nanoceramics. J Sol-Gel Sci Technol 109, 97–109 (2024). https://doi.org/10.1007/s10971-023-06255-y

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